<template>
  <div>
    <!-- 图片上传组件辅助 -->
    <el-upload
      class="avatar-uploader quill-img"
      :action="uploadImgUrl"
      name="file"
      :headers="headers"
      :show-file-list="false"
      :on-success="quillImgSuccess"
      :on-error="uploadError"
      :before-upload="quillImgBefore"
      accept=".jpg,.jpeg,.png,.gif"
    ></el-upload>

    <!-- 富文本组件 -->
    <quill-editor
      class="editor"
      v-model="content"
      ref="quillEditor"
      :options="editorOption"
      @blur="onEditorBlur($event)"
      @focus="onEditorFocus($event)"
      @change="onEditorChange($event)"
    ></quill-editor>
  </div>
</template>

<script>
import { getToken } from '@/utils/auth';

// 工具栏配置
const toolbarOptions = [
  ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
  ['blockquote', 'code-block'], // 引用  代码块
  [
    {
      list: 'ordered'
    },
    {
      list: 'bullet'
    }
  ], // 有序、无序列表
  [
    {
      indent: '-1'
    },
    {
      indent: '+1'
    }
  ], // 缩进
  [
    {
      size: ['small', false, 'large', 'huge']
    }
  ], // 字体大小
  [
    {
      header: [1, 2, 3, 4, 5, 6, false]
    }
  ], // 标题
  [
    {
      color: []
    },
    {
      background: []
    }
  ], // 字体颜色、字体背景颜色
  [
    {
      align: []
    }
  ], // 对齐方式
  ['clean'], // 清除文本格式
  ['link', 'image', 'video'] // 链接、图片、视频
];

import { quillEditor } from 'vue-quill-editor';
import hljs from 'highlight.js';
import 'quill/dist/quill.core.css';
import 'quill/dist/quill.snow.css';
import 'quill/dist/quill.bubble.css';
import 'highlight.js/styles/vs2015.css';
export default {
  props: {
    /* 编辑器的内容 */
    value: {
      type: String
    },
    /* 图片大小 */
    maxSize: {
      type: Number,
      default: 4000 //kb
    }
  },
  components: {
    quillEditor
  },
  data() {
    return {
      content: this.value,
      editorOption: {
        placeholder: '',
        theme: 'snow', // or 'bubble'
        placeholder: '请输入内容',
        modules: {
          toolbar: {
            container: toolbarOptions,
            handlers: {
              image: function(value) {
                if (value) {
                  // 触发input框选择图片文件
                  document.querySelector('.quill-img input').click();
                } else {
                  this.quill.format('image', false);
                }
              }
            }
          },
          syntax: {
            highlight: text => {
              return hljs.highlightAuto(text).value; // 这里就是代码高亮需要配置的地方
            }
          }
        }
      },
      uploadImgUrl: process.env.VUE_APP_BASE_API + '/yr-cloud-service-file/file/upload', // 上传的图片服务器地址
      headers: {
        Authorization: getToken()
      }
    };
  },
  watch: {
    value: function() {
      this.content = this.value;
    }
  },
  methods: {
    onEditorBlur() {
      //失去焦点事件
    },
    onEditorFocus() {
      //获得焦点事件
    },
    onEditorChange() {
      //内容改变事件
      this.$emit('input', this.content);
    },

    // 富文本图片上传前
    quillImgBefore(file) {
      let fileType = file.type;
      if (fileType === 'image/jpeg' || fileType === 'image/png') {
        return true;
      } else {
        this.$message.error('请插入图片类型文件(jpg/jpeg/png)');
        return false;
      }
    },

    quillImgSuccess(res, file) {
      // res为图片服务器返回的数据
      // 获取富文本组件实例
      let quill = this.$refs.quillEditor.quill;
      // 如果上传成功
      if (res.code == 200) {
        // 获取光标所在位置
        let length = quill.getSelection().index;
        // 插入图片  res.url为服务器返回的图片地址
        quill.insertEmbed(length, 'image', res.data.img);
        // 调整光标到最后
        quill.setSelection(length + 1);
      } else {
        this.$message.error('图片插入失败');
      }
    },
    // 富文本图片上传失败
    uploadError() {
      // loading动画消失
      this.$message.error('图片插入失败');
    }
  }
};
</script>

<style>
.editor {
  line-height: normal !important;
  height: 700px;
}

.quill-img {
  display: none;
}

.ql-snow .ql-tooltip[data-mode='link']::before {
  content: '请输入链接地址:';
}

.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: '保存';
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode='video']::before {
  content: '请输入视频地址:';
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: '14px';
}

.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
  content: '10px';
}

.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
  content: '18px';
}

.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
  content: '32px';
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: '文本';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
  content: '标题1';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
  content: '标题2';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
  content: '标题3';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
  content: '标题4';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
  content: '标题5';
}

.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
  content: '标题6';
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: '标准字体';
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
  content: '衬线字体';
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
  content: '等宽字体';
}

.ql-editor {
  font-size: 14px;
  line-height: 1.5;
}

.ql-editor ol > li,
.ql-editor ul > li {
  line-height: 2;
  padding-left: 0em !important;
  list-style-type: unset;
}
.ql-editor ol,
.ql-editor ul {
  padding-left: 2.5em !important;
}
.ql-editor li::before {
  display: none;
}
.ql-container.ql-snow {
  border: 1px solid #ccc;
}
.ql-snow .ql-editor pre.ql-syntax {
  padding: 16px;
  color: #ddd;
  font-family: Operator Mono, Consolas, Monaco, Menlo, monospace;
  font-size: 12px;
  padding-top: 15px;
  background: #272822;
  border-radius: 5px;
  box-shadow: rgba(0, 0, 0, 0.55) 0px 2px 10px;
}
</style>
